Data meshes are a hot topic. Many companies claim to deliver a data mesh, but in reality the technology is still nascent. ING is actively working together with partners to develop an open source data mesh, with a big focus on how we can manage the data across the entire landscape via the associated metadata. Not only is is necessary to have a mindset of thinking in decentralised data management, and in the concept of data products, but also to fit the data mesh into a very heterogeneous data landscape, where all vendors have their own data management tooling. The concept of an open metadata exchange format, delivered as an open source product called Egeria is needed to have a metadata highway (open metadata) next to the data highway (data mesh)